xcb-proto: Fix install conflict when enable multilib.

xcb-proto: Fix install conflict when enable multilib.

Error: Transaction test error:
  file /usr/share/pkgconfig/xcb-proto.pc conflicts between attempted installs of lib32-xcb-proto-dev-1.15.2-r0.armv7ahf_neon and xcb-proto-dev-1.15.2-r0.cortexa57

The differences between the two files are as follows:
@@ -2,7 +2,7 @@
 exec_prefix=/usr
 datarootdir=${prefix}/share
 datadir=/usr/share
-libdir=/usr/lib64
+libdir=/usr/lib
 xcbincludedir=${pc_sysrootdir}${datadir}/xcb
 PYTHON_PREFIX=${prefix}
 pythondir=${pc_sysrootdir}${libdir}/python3.11/site-packages

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit 4876189dd2ae5a04a296b11b537b9f613159c6bf)
Signed-off-by: Steve Sakoman <steve@sakoman.com>